遥感相机电子学非线性对调制传递函数的影响及其判别

李俊霖; 郭永飞; 李静秋; 兰太吉

doi:10.3788/OPE.20152311.3219

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遥感相机电子学非线性对调制传递函数的影响及其判别

信息科学 | 更新时间：2020-08-13

- 遥感相机电子学非线性对调制传递函数的影响及其判别
- Influence of electronic nonlinearities of space camera on MTF and their discriminance
- 光学精密工程 2015年23卷第11期页码：3219-3226
- 作者机构：
  
  1. 中国科学院长春光学精密机械与物理研究所,吉林长春,中国,130033
  2. 中国科学院大学北京,中国,100049
- 作者简介：
- 基金信息：
  
  吉林省科技发展计划资助项目(No.20120331)()
- DOI：10.3788/OPE.20152311.3219
  中图分类号： V447.3;TN386.5
- 收稿日期：2014-12-09，
  
  修回日期：2015-02-12，
  
  纸质出版日期：2015-11-25
- 稿件说明：
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李俊霖, 郭永飞, 李静秋等. 遥感相机电子学非线性对调制传递函数的影响及其判别[J]. 光学精密工程, 2015,23(11): 3219-3226

LI Jun-lin, GUO Yong-fei, LI Jing-qiu etc. Influence of electronic nonlinearities of space camera on MTF and their discriminance[J]. Editorial Office of Optics and Precision Engineering, 2015,23(11): 3219-3226
李俊霖, 郭永飞, 李静秋等. 遥感相机电子学非线性对调制传递函数的影响及其判别[J]. 光学精密工程, 2015,23(11): 3219-3226 DOI： 10.3788/OPE.20152311.3219.

LI Jun-lin, GUO Yong-fei, LI Jing-qiu etc. Influence of electronic nonlinearities of space camera on MTF and their discriminance[J]. Editorial Office of Optics and Precision Engineering, 2015,23(11): 3219-3226 DOI： 10.3788/OPE.20152311.3219.

摘要

遥感相机电子学系统在信号转换过程中会产生V/Q非线性和DN/V非线性

并均会对成像子系统的调制传递函数(MTF)造成影响。本文研究了这两种电子学非线性的产生机理和对MTF的影响并提出了相应的判别方法。从两种非线性的产生机理出发

建立了V/Q非线性和DN/V非线性模型

深入分析了两者对相机MTF的影响并进行了仿真实验。实验表明

非线性造成了电子学MTF的下降

使其由正常状态下的0.55下降为0.47

此外还导致MTF随照度变化。提出了基于视频响应曲线结合响应非均匀性(PRNU)噪声曲线区分V/Q非线性和DN/V非线性的方法并进行了仿真验证。仿真实验验证了提出方法的有效性

为系统设计、改进和非线性补偿提供了有力支持。

Abstract

The electronics system in a remote sensing camera will generate V/Q nonlinearity and DN/V nonlinearity in signal conversion processing and both of them effect the Modulation Transform Function(MTF) of the sub-imaging system. This paper focuses on the generation mechanism of two kinds of electronic nonlinearities and the effects of the nonlinearities on the MTF and proposes a discriminant method for the electronic nonlinearities. On the basis of the generation mechanism

the V/Q and DN/V nonlinearity theoretical models are established

their effects on the MTF of the camera are researched and a simulation experiment is performed. Experimentl results show that the MTF falls with electronic nonlinearity from 0.55 under a normal state to 0.47

and it also changes with illumination. Finally

a method based on combination of a video response curve and a Photo-response Non-uniformity(PRNU) noise curve is proposed to distinguish the V/Q nonlinearity and DN/V nonlinearity. The simulation is put forward and the feasibility of the proposed method is verified. The research provides strong supports for the design

improvement and nonlinearity compensation of remote sensing cameras.

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references

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